The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 15, 2025
Filed:
Jan. 09, 2024
Applicant:
Hiroshi Nakai, Kanagawa, JP;
Inventor:
Hiroshi Nakai, Kanagawa, JP;
Assignee:
RICOH COMPANY, LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G 15/02 (2006.01); G03G 21/00 (2006.01); G03G 21/18 (2006.01);
U.S. Cl.
CPC ...
G03G 15/0216 (2013.01); G03G 21/0035 (2013.01); G03G 21/1814 (2013.01); G03G 2221/0005 (2013.01);
Abstract
A process cartridge includes an electrostatic latent image bearer, a charging roller, and a brush roller. The charging roller charges the electrostatic latent image bearer and includes a conductive support and a resin layer covering the conductive support and defining an outermost surface layer of the charging roller The brush roller cleans the charging roller and includes fiber bristles. The charging roller and the brush roller satisfy the following relational expressions 1 and 2: